Since you pointed that old message of yours recently, i will comment on that part :
Well, no, when you are zoomed out, or looking elsewhere, you don't see it at first glace, and you can skip it. That what i did in my first test. Then I realized later what this was.
- My slaves unable to give birth, how to get babies?
- See if there is any difference between empty room, and the room currently used.
- Like really, do not turn on your 'they're the same picture' mode filter.